WO2002042045A1 - Procede de chauffage de tubes en plastique et dispositif servant a mettre en oeuvre le procede - Google Patents

Procede de chauffage de tubes en plastique et dispositif servant a mettre en oeuvre le procede Download PDF

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Publication number
WO2002042045A1
WO2002042045A1 PCT/EP2001/012320 EP0112320W WO0242045A1 WO 2002042045 A1 WO2002042045 A1 WO 2002042045A1 EP 0112320 W EP0112320 W EP 0112320W WO 0242045 A1 WO0242045 A1 WO 0242045A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating
temperature
plastic
plastic pipes
infrared radiators
Prior art date
Application number
PCT/EP2001/012320
Other languages
German (de)
English (en)
Inventor
Peter Finkler
Hans Gerd MÜLLER
Original Assignee
Sms Extrusion Kempen Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sms Extrusion Kempen Gmbh filed Critical Sms Extrusion Kempen Gmbh
Priority to BR0107798-8A priority Critical patent/BR0107798A/pt
Priority to AU2002218258A priority patent/AU2002218258A1/en
Publication of WO2002042045A1 publication Critical patent/WO2002042045A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B29B13/024—Hollow bodies, e.g. tubes or profiles
    • B29B13/025—Tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C2037/90—Measuring, controlling or regulating

Definitions

  • the invention relates to a method for heating at least parts of plastic pipes in at least one heating station, preferably in socket molding plants, the plastic pipes being at least partially brought to the deformation temperature in the heating station and a device for carrying out the method.
  • the ends of plastic pipes produced by extrusion are usually deformed in such a way that the ends of the plastic pipes can be plugged into one another for later use to form a tight connection.
  • the pipe ends For the deformation in the socket molding system, the pipe ends must first be brought to a certain deformation temperature. Due to the constantly increasing extrusion performance in plastic production, shorter and shorter cycle times are necessary for socket molding systems.
  • the problem here is that it takes a relatively long time to heat the pipe ends. In order to achieve the required heating times, it is part of the state of the art, e.g. heat the pipe ends one after the other in two or three heating stations.
  • the equipment structure and the energy requirement is relatively high.
  • a constant heating energy is emitted to the pipe surface in the form of heat conduction, for example in a contact oven, hot-air oven or an oil bath or by long-wave heat radiation, for example by an infrared ceramic radiator.
  • the temperature of the medium or the radiator is regulated to a constant value.
  • the heat transfer takes place on the surface of the plastic pipes.
  • plastic is a poor heat conductor, long heating times are required for this process, especially with thick-walled pipes.
  • the warm-up time is roughly halved or divided into three.
  • the invention is based on the object of proposing a generic method and a device in which the aforementioned problems do not exist.
  • the plastic pipes preferably the pipe ends that are to be formed into a sleeve, are heated in the heating station with short-wave or halogen infrared radiators from the inside and / or outside and the heating power of the infrared radiators is controlled or regulated during the heating process of the plastic pipes.
  • the short-wave infrared heaters reach their operating temperature very quickly. This makes it possible to switch on the spotlights only during production, e.g. when the pipe end is inserted into the heating station or when it is already completely inside. Preheating the heating before the start of production is no longer necessary.
  • the infrared strhalers can therefore be switched off during the downtime.
  • thermal damage to the material is avoided by measuring the surface temperature and controlling or regulating the heating power according to the invention.
  • the plastic is heated very gently and homogeneously.
  • the active regulation of the heating power is made possible in particular by the use of the very fast reacting short-wave infrared radiators.
  • infrared radiators with a wavelength of up to 3 ⁇ m, preferably up to 2 ⁇ m, and a radiation pyrometer can be used for the contactless temperature measurement.
  • the device according to the invention for heating at least parts, preferably pipe ends, of plastic pipes for carrying out the method consists of a heating station with a housing which is open at least on one side, into which at least the pipe ends of the plastic pipes can be inserted axially and is characterized in that in the housing parallel to the plastic pipes one or more short-wave infrared emitters distributed uniformly on the outer circumference and / or protruding into the plastic tube and at least one contactless temperature sensor measuring the temperature of the plastic tube are arranged and that the temperature sensor is connected to the power supply of the infrared emitters via a temperature controller and a power controller.
  • the method according to the invention has the following advantages compared to conventional and known methods: 1. considerable reduction in heating time,
  • Fig. 1 shows a side view of the open housing 3 of the heating station 1
  • Fig. 2 shows a corresponding view from the front of Fig. 3 shows the control scheme of the device according to the invention
  • Fig. 4 shows an exemplary temperature profile during the heating process
  • Fig. 5 shows an exemplary profile of the heating power of the short-wave Infrared heater during the heating process.
  • the heating station 1 is only shown in principle.
  • the pipe ends of the plastic pipes 2 are pushed axially into the housing 3 of the heating station, which is open on one side.
  • the short-wave infrared radiators 4 are fastened to holding strips 6 by means of insulators 11 to heat the plastic pipes 2 evenly distributed over the circumference.
  • the short-wave infrared radiators 5 protrude from the side of the housing 3 opposite the insertion opening into the boiler room. These are also attached to holding strips 7 by means of insulators.
  • the infrared emitters 4, 5 extend almost over the entire length of the boiler room in accordance with the length of the plastic tube 2 to be heated.
  • the infrared emitters 4, 5 are also connected to the electrical energy source via electrical connection cables 8, 9.
  • a non-contact temperature sensor 10 is directed radially onto the plastic tube at about half the length of the area of the plastic tube 2 to be heated.
  • This temperature sensor 10 consists of a commercially available Radiation pyrometer. 3, this temperature sensor 10 is connected via a temperature controller 13 and a power controller 14 to the energy supply of the infrared radiators 4, 5. In order to achieve uniform heating of the plastic pipes 2, they are rotated about their longitudinal axis 12 during the heating process.
  • FIG. 4 shows an example of the temperature profile of the surface temperature measured with the temperature sensor 10. This shows that a high surface temperature is measured after a relatively short time. This initial surface temperature is still slightly above the target temperature. By controlling the heating power, especially as a function of the measured temperature, the surface temperature then settles to the target temperature. Depending on the wall thickness, this target temperature is then maintained for a certain time until complete heating of the plastic pipe is ensured.
  • FIG. 5 shows the course of the heating power with which the infrared radiators 4, 5 are applied for the same issue as in FIG. 4. It turns out that the highest possible heat output only has to be applied for a short time until a certain surface temperature is reached. Immediately afterwards, the heating output can be significantly reduced. According to the invention, it is controlled in such a way that the desired surface temperature is maintained until the plastic tube is brought completely to the deformation temperature.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

La présente invention concerne un procédé de chauffage d'au moins certaines parties de tubes en plastique (2) dans au moins une station de chauffage (1), de préférence dans des installations de moulage de manchons, les tubes en plastique (2) étant au moins partiellement portés à une température de formage dans la station de chauffage (1). Le procédé de l'invention a pour objet de permettre le chauffage de l'intérieur et/ou de l'extérieur des tubes en plastique (2) au moins partiellement dans la station de chauffage (1) grâce à des rayonnements à courte longueur d'onde ou halogène-infrarouge (4, 5), et la commande ou la régulation de la puissance de chauffage du rayonnement infrarouge (4, 5) durant le processus de chauffage des tubes en plastique (2).
PCT/EP2001/012320 2000-11-24 2001-10-25 Procede de chauffage de tubes en plastique et dispositif servant a mettre en oeuvre le procede WO2002042045A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR0107798-8A BR0107798A (pt) 2000-11-24 2001-10-25 Processo para o aquecimento de pelo menos partes de tubos de plástico e dispositivo para a realização do processo
AU2002218258A AU2002218258A1 (en) 2000-11-24 2001-10-25 Method for heating plastic tubes and a device for carrying out this method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10058505.1 2000-11-24
DE2000158505 DE10058505A1 (de) 2000-11-24 2000-11-24 Verfahren zur Anwärmung von Kunststoffrohren und Vorrichtung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
WO2002042045A1 true WO2002042045A1 (fr) 2002-05-30

Family

ID=7664599

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/012320 WO2002042045A1 (fr) 2000-11-24 2001-10-25 Procede de chauffage de tubes en plastique et dispositif servant a mettre en oeuvre le procede

Country Status (4)

Country Link
AU (1) AU2002218258A1 (fr)
BR (1) BR0107798A (fr)
DE (1) DE10058505A1 (fr)
WO (1) WO2002042045A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104093533A (zh) * 2012-02-01 2014-10-08 吕埃尔斯机械及钢结构有限责任公司 用于加热塑料管的端部区段的方法和装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015853A1 (de) * 2006-04-03 2007-10-04 Ibt Infrabio Tech Gmbh Erwärmungsverfahren für Kunststoffe u.a. Materialien mit einer speziellen Infrarotvorrichtung
EP3134242B1 (fr) 2014-04-22 2019-12-25 Sica S.P.A. Poste permettant de chauffer des tuyaux en matière thermoplastique
EP3134241B1 (fr) 2014-04-22 2020-04-08 Sica S.P.A. Appareil et procédé permettant de chauffer des tuyaux en matière thermoplastique
DE102016125115B4 (de) * 2016-12-21 2019-12-19 Gemini Gmbh Vorrichtung und Verfahren zur Herstellung von kreis- oder kreissegmentförmigen Geometrien von thermoplastisch verformbaren Kunststoff-Mehrkammer-Hohlprofilen
IT201900006438A1 (it) * 2019-04-29 2020-10-29 Sica Spa Macchina bicchieratrice di tubi in materiale termoplastico e metodo di controllo dello stato termico di una stazione di riscaldamento di detta macchina

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962737A1 (de) * 1969-12-15 1971-07-15 Rudolf Harmstorf Verfahren und Vorrichtung zur Herstellung von Muffenrohren
US3857666A (en) * 1973-04-09 1974-12-31 L Barnett Apparatus for belling ends of conduit or the like
US4005968A (en) * 1975-05-19 1977-02-01 Phillips Petroleum Company Pipe end reforming apparatus
DE2536306A1 (de) * 1975-08-14 1977-02-24 Thyssen Plastik Anger Kg Anwaermofen mit infrarotheizung
US4014640A (en) * 1970-08-07 1977-03-29 Vern Emery Company, Inc. Pipe belling and chamfering machine
DE3202981A1 (de) * 1982-01-29 1983-08-11 Eugen 7547 Wildbad Riexinger Vorrichtung zum aufheizen des endes eines kunststoffrohres, insbesondere aus vernetztem polyaethylen
EP1054469A1 (fr) * 1999-05-19 2000-11-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Dispositif et procédé de chauffer de composants en matière plastique et absorbante de micro-ondes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230557A1 (de) * 1991-09-20 1993-03-25 Basf Ag Verfahren und vorrichtung zur herstellung von bauteilen aus verbundwerkstofflaminaten mit duromermatrix
DE19748209A1 (de) * 1997-10-31 1999-05-06 Thomas Schuerhoff Verfahren zum Schmelzverbinden von Kunststoffteilen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962737A1 (de) * 1969-12-15 1971-07-15 Rudolf Harmstorf Verfahren und Vorrichtung zur Herstellung von Muffenrohren
US4014640A (en) * 1970-08-07 1977-03-29 Vern Emery Company, Inc. Pipe belling and chamfering machine
US3857666A (en) * 1973-04-09 1974-12-31 L Barnett Apparatus for belling ends of conduit or the like
US4005968A (en) * 1975-05-19 1977-02-01 Phillips Petroleum Company Pipe end reforming apparatus
DE2536306A1 (de) * 1975-08-14 1977-02-24 Thyssen Plastik Anger Kg Anwaermofen mit infrarotheizung
DE3202981A1 (de) * 1982-01-29 1983-08-11 Eugen 7547 Wildbad Riexinger Vorrichtung zum aufheizen des endes eines kunststoffrohres, insbesondere aus vernetztem polyaethylen
EP1054469A1 (fr) * 1999-05-19 2000-11-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Dispositif et procédé de chauffer de composants en matière plastique et absorbante de micro-ondes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104093533A (zh) * 2012-02-01 2014-10-08 吕埃尔斯机械及钢结构有限责任公司 用于加热塑料管的端部区段的方法和装置
CN104093533B (zh) * 2012-02-01 2016-12-14 吕埃尔斯机械及钢结构有限责任公司 用于加热塑料管的端部区段的方法和装置

Also Published As

Publication number Publication date
AU2002218258A1 (en) 2002-06-03
DE10058505A1 (de) 2002-06-06
BR0107798A (pt) 2002-10-22

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